The bottom hole of the dam is blocked by a flat rectang

The bottom hole of the dam is blocked by a flat rectangular shield (Fig. 3), pivotally attached to the dam body with its upper edge. Determine what force is needed, apply to the cable to open the shield, if the immersion depth of the lower edge of the shield H, the height of the shield, the width of the shield b, the angle between the direction of the cable and the horizon α. ​​The bottom hole of the dam is blocked by a flat rectangular shield (Fig. 3), articulated attached to the dam body with its upper edge. Determine what force is needed, apply to the cable to open the shield, if the immersion depth of the lower edge of the shield H, the height of the shield, the width of the shield b, the angle between the direction of the cable and the horizon α.
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